Malicious PDF — malware analysis report

Static analysis result for SHA-256 db7eb86ef2fc9c11…

MALICIOUS

PDF

80.1 KB Created: 2021-05-15 12:40:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 02045fd4c7c32ff0e1ae8c739ec8e827 SHA-1: 33fe69d2e63534e4293ae5df048c874c8f218d6c SHA-256: db7eb86ef2fc9c110512ce04eca4660ce0547f56153639449fd2aa1817acd35d
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm with numerous external links, including one to `https://baarspo.ru/strik?utm_term=can+you+download+wii+sports+on+original+wii`, suggesting a phishing or malware distribution lure. The document body, though heavily corrupted, contains text related to software downloads, reinforcing the lure aspect.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://baarspo.ru/strik?utm_term=can+you+download+wii+sports+on+original+wii PDF link annotation
    • http://xomipula.22web.org/ti_nspire_cx_2_cas_sat.pdfIn PDF document text
    • http://sumidabitax.iblogger.org/low_calorie_drinks_at_dunkin_donuts.pdfIn PDF document text
    • http://noxitafevinuv.22web.org/memizubewumekugogafezumi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b064d0e4-88d6-4b7e-8087-8ebf790fcba6.filesusr.com/ugd/ca32a8_c4cfe2a2f6c4457884387345d2adbee5.pdf?index=trueIn PDF document text
    • http://kasisexa.rf.gd/36456084865.pdfIn PDF document text
    • http://nopizapokife.epizy.com/and_1_street_basketball_apk.pdfIn PDF document text
    • https://cf4de027-7369-46c2-bf93-d69cabef2b5e.filesusr.com/ugd/868b90_78c8627cc03346ab9f55235963c9b492.pdf?index=trueIn PDF document text
    • http://wipedeposadav.rf.gd/airbrush_unlocked_mod_apk.pdfIn PDF document text
    • https://650c977b-0274-48a2-8498-43c0efc39f4e.filesusr.com/ugd/dbad32_4b5f2cce28ad4e2190937b65f8881f46.pdf?index=trueIn PDF document text
    • https://badbb018-ab4e-499b-b788-960949b82e3d.filesusr.com/ugd/4f4c56_a14feb68b51f4ef7beed9c7a30c1617d.pdf?index=trueIn PDF document text
    • http://safatagikev.rf.gd/97110306996.pdfIn PDF document text
    • http://fobifuv.epizy.com/rakopu.pdfIn PDF document text
    • http://ruxuwidoke.epizy.com/kubota_l3010_owners_manual_download.pdfIn PDF document text
    • http://rabewifawilowe.epizy.com/act_punctuation_practice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9360f57b-3dc7-4204-bebd-bd2f2d6da980/94524114823.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80d5af6b-a790-44b4-82f6-2ab36119e177/tawiboxegimobepuvuritir.pdfIn PDF document text
    • https://c3d762b3-5d50-4891-ab6d-43710edd2423.filesusr.com/ugd/3254bf_71df387353c8421da13a6b3bfa0de0d4.pdf?index=trueIn PDF document text
    • https://be08d7d4-326a-4801-be9d-4496af17a43b.filesusr.com/ugd/d31907_cc72526c4a1740249a8aedd8de6e32e9.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF739 5228 bytes
SHA-256: e68cddd1af32245595f5684d33c82004430002d8d07d30cafd3032b56cffdb55
font_01_sfnt_off00010926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10926 11912 bytes
SHA-256: 7fbacd3ce9b30efe71c6206740002f34674e7586e7187fcf03033cd4e721c792

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